Creating A Slideshow With Custom Intervals Between Slides

I've found many examples of creating slideshows using javascript all over the internet and these forums. However, I haven't found any that show how to create a slideshow and give each slide a different time interval between switching to the next one.

I'm changing my website over from a Flash based one to something that can be read on all devices. In doing so I've looked for ways to add a little motion to the site. I'm working with a friend who has been doing most of the site but here and there I like to get my hands dirty and try some things on my own. Unfortunately he doesn't know Javascript.

I wanted to have an animation window in the bottom corner of the page. Look at [url] to see what I came up with. I took a slider plugin for Wordpress and basically created a bunch of slides and entered them in to switch every .5s so that I could change how quickly they changed images by making some of them repeat the same slide 4 times for 2s, 2 times for 1s, etc. Though it's not pretty, it works. On Firefox everything looks great although it'd be nice to have fade in and out on each slide. On an iPad or IE it actually shows the flash between slides even when they're the same image. Quite frankly, it's ugly. Does anybody have any ideas?

I'm trying to get this to work in a Wordpress site on a window with dimensions of 450X230.